[…] A new joint report from the two NGOs has found that 37 active substances currently approved for use in pesticides are PFAS. That equates to 12 per cent of all approved synthetic substances. […]
I’ve got a technical bone to pick with the article. It seems that the article is referring to the active ingredients in pesticides themselves (instead of, say, some kind of perfluorinated surfactant additive). The active ingredients of the two pesticides called out in the article (Flufenacet and Diflufenican) each contain a -CF3 unit, and so they are PFASs themselves. The molecular structures are published, so saying “PFASs SHOCKINGLY discovered in pesticides” is a bit like saying “metal SHOCKINGLY discovered in food additives” in reference to table salt. Now admittedly table salt is pretty benign and pesticides are decidedly not, at least to certain organisms.
As a side note, fluorinated functional groups (including polyfluoroalkyls, the “PFA” of PFAS) are often incorporated into bioactive molecules to increase metabolic stability or to change properties like lipophilicity and acidity/basicity. This, even though fluorinated organic molecules are extremely rare in nature. You find them all the time in drugs, including well-known ones like fluoxetine (Prozac) and celecoxib (Celebrex). Given the huge space of possible structures that could contain such a group, I am skeptical that all polyfluoroalkyl-containing molecules (PFASs) are as bad as e.g., PFOS wrt stability and toxicity; however, given their greater tendency to stick around relative to their non-fluorinated counterparts, regulation is likely prudent, especially for higher-volume chemicals like coatings, surfactants, and yes, pesticides.
Wow, game over then. Looks like we’re all fucked. Apart from my son, who shuns vegetables.
Go for organics instead (obviously only an option if finances allow for it).
Eating animal products certainly is not the answer. Not least since those animals usually are fed with soy/corn grown in regions where pesticide use is not particularly well-regulated.
“Forever chemicals” is only mostly true anymore. There are ways to deal with at least some of them, although them being in the environment already makes it a lot harder. If humans would stop emitting, there’d be a chance of slowly getting to a better state again though.
Eating meat doesn’t save you. Animals eat pesticide-laced plants, you (or our son) eats animal. It doesn’t magically disappear in-between.
“Chronic exposure to a glyphosate-containing pesticide leads to mitochondrial dysfunction and increased reactive oxygen species production in Caenorhabditis elegans.” https://pubmed.ncbi.nlm.nih.gov/29190595
Im guessing all the news articles are intentionally not mentioning how long these chemicals last
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“Forever” means longer than is practical for humans. Nuclear waste doesn’t emit lethal doses of gamma radiation forever but it might as well be as it is in the timescale of 100’000 years and longer, a timescale which doesn’t compare to a human scale. I mean we haven’t even had electricity for 1000 years, yet alone 100’000.
Another reason a clear number isn’t given is because we don’t know for sure. If a scientist says “we’re not sure best guess at least 500 years” then the newspapers will headline “PTFE STAYS IN BABIES BRAINS FOR 500 YEARS”. A headline people will remember. In 20 years someone finds out it doeen’t accumulate in the brain but in the liver and the kidneys, and that until death, so for 90 years, not 500. Newspapers will headline “PTFE NOT IN BRAIN BUT LIVER”. People will go “aha, science can’t be trusted!” and refuse to get vaccinated, deny climate change or similar stupid things.
That is why scientists have become very, very cautious in giving out simple numbers which can and will be quoted out of context and in a misleading way until they are very, very sure.
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